Barbara walters' special, "the ten most fascinating people of the year" is much of loved. The people we've been talking about all year long. It's hard to fathom that the 2013 edition, the 21st year will be the last. It's true. Barbara is here to tell us about this year's fascinating show. And the new pope is on the list. But you just told me it's the last. I'm in tears. I know. We all are. It's the longest-running special. Who knows? Maybe by popular demand we'll stay on another year. Would you? At the moment, this is the last. The pope, he is on our list because he is one of the most fascinating people. We did not do an interview with him. No pope has done an interview. Maybe it will happen now. Even for you. It's hard to imagine. Look at the people we have. Miley cyrus. She does an interview. We interviewed her five years ago. Now, she is 21. Not quite sticking out the tongue. But very changed. And much wiser than you would expect from seeing the antics. You want me to go on? I would like to see the clip, if you don't mind. Here's a -- mind? A little clip of barbara walters with miley cyrus. You have gotten what some would consider bad publicity. You have been called, desperate. Ooh. Deeply troubled. Ooh. Disgraceful. I know I'm not. So, that's why I kind of laugh because I feel like the people that are saying that, I don't know exactly who is saying that because I refuse to google myself. The minute I stopped googles myself, you can't imagine what a happier person I am. Why do you stick your tongue out all the time? I'm embarrassed to take pictures. People take pictures of me and i don't know how to smile and be awkward. So, I stick my tongue out because I don't know what else to do because I get embarrassed. So, now we know what the tongue is all about. A little bit, yeah. Robin roberts -- robin is on our list because she had a triumphant year. And she inspired so many people. She became for us one of the most fascinating people. Always has been. Never more than now. Want to take a look? Yes, please. Can you describe the year in one word? Fascinating. Yeah. Well that's, pretty -- unpredictable. The word that really comes to mind, is I'm filmed with such gratitude. Gratitude that I'm here. And for the outpouring. I don't take that lightly. I know that was a big reason, is a big reason why my recovery went well. I don't know of a day that's gone by that someone hasn't come up to me and said, I was praying for you. I was lifting you up. And I look them in the eye. And I mean this, barbara. I felt those prayers. I felt the well wishes. And I just know it was invaluable to my recovery. I know it was. Yep. Who else? We go from robin roberts, inspiring to the "duck dynasty" quack. They were fascinating. Run the gamut. Jennifer lawrence, a vivid, young actress. And we have such a great list for you. You won't tell us number one. The number one is a secret. I was trying to guess. You will not give it up. No. I'm dying to know. 21 years of this. If you can name one person, the most fascinating, ten seconds. Who is it? You, darling. Can I ever lie? I am the most fascinating liar there is. You know I love you. We love the special. Happy holidays. And thank you for 21 years of the "ten most fascinating people of 2013." You can watch the special tonight at 9:30, 8:30 on abc. We adore you. I want to go outside to

This transcript has been automatically generated and may not be 100% accurate.

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